Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
obtain when the powei is to the resistance as the distancehetiocen the threads is to the sweep of the cranh. Combination of the five mechanical powers.—By such acombination, could materials of sufficient strength ])e had, there couldbe exerted almost an unlimited force, but only through a… … In estimating the force of this engine, suppose the dimensions of itsseveral parts to be as follows: Length of the lever or crank 18 inches, Distance between threads of screw 1 inch, Diameter of the toothed wheel 4 feet, Diameter of the axle, L, of the wheel 1 foot, Compound pulley, T 4 ropes.…
Physics · Astronomy
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